There had been changes to the Monaco circuit with the pits moving to the waterfront by the chicane and the track going straight down from the tunnel to a new chicane nearer Tabac. Under pressure from the teams the Automobile Club of Monaco agreed that 25 cars could start.

It rained throughout Saturday and on Sunday morning the weather was still bad. At the start Beltoise made a great start to grab the lead from Regazzoni while the front row men were third and fourth. Then came Ickx, Stewart and the rest.

The conditions were terrible and so the leader had a big advantage and he was able to pull away quickly. On the fifth lap he was helped when Regazzoni went up the escape road at the chicane, taking Fittipaldi and Ickx with him. By the time they were all back on track Ickx was ahead of Regazzoni and Fittipaldi. Beltoise was having the race of his life and even Ickx could not make any impression. Further back a lot of drivers made mistakes and hit the barriers but Beltoise kept going to win his first (and only) Grand Prix victory. Ickx finished second while Regazzoni fell behind Stewart (who had worked his way past Amon and Fittipaldi) in the mid-race. The Tyrrell driver then spun and so Regazzoni went back ahead. The Swiss driver then spun on some oil and hit the barriers and so Stewart held third, despite a misfire, until the closing laps when Fittipaldi overtook him to take the final place on the podium. Redman finished fifth after working his way up through the field.